Xcode 8 App installation failed, unknown error occured

Question

The following error occurred when I tried to run a project on my iOS device. Running it on a simulator works fine.

The other weird thing is that I am able to run my other projects on my device, only this particular project that is giving me this error.

I tried all the solutions I'm able to find:

1. Cleaning the project, deleting derived data
2. Restarting Xcode, my Mac, and my iOS device
3. Deselect 'Automatically manage signing' in the testing Target.
4. I couldn't delete the app from my device and re-install it because it wasn't installed on my device before.

Any help would mean alot to me! I am using Xcode 8.1 with Swift 3.0, running on a iOS 10.1.1 device.

Answer 1

1. Close your Xcode completely from currently running on Dock
2. Unplug your iDevices cable at your Mac and plug again.
3. Open Xcode Again.
4. Clean,Build and Wait for indexing the device
5. Delete the previous app you install on your iDevice
6. Then install

If you have free Developer ID, make sure you got the Internet access right on your iDevices.

Else,

1. Check your provision profile or certificates of your app that it's still available or not [Expire or not].
2. If expired, please create again.
3. Install those latest provision profile at your Xcode Preferences/Account/Detail/
4. Make sure Signing "Debug" and "Release" aren't empty
5. Close the Xcode(Completely quit from Dock) after you completed those steps
6. Open the Xcode again and do Clean,Build and Install

Hope this help.

Other alternative way,

• Remove the app on the device and re-install
• Change build version no and install again

Answer 2

Clean your the project and reattach your device